ARTICULATING CMM PROBE

• US 20150362305A1
• Filed: 06/08/2015
• Published: 12/17/2015
• Est. Priority Date: 06/11/2014
• Status: Active Grant

• Current Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Original Assignee: Hexagon Metrology Incorporated (Hexagon AB)
• Inventors: Ferrari, Paul, Jung, Hyun Kwon, McKnight, James F.
• Granted Patent: US 9,759,540 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01B 11/007 feeler heads therefor
• CPC Class Codes: G01B 15/08 for measuring roughness or irregularity of surfaces
• CPC Class Codes: G01B 17/08 for measuring roughness or irregularity of surfaces
• CPC Class Codes: G01B 21/047 Accessories, e.g. for positioning, for tool-setting, for measuring probes
• CPC Class Codes: G01B 5/012 Contact-making feeler heads therefor
• CPC Class Codes: G01B 7/012 Contact-making feeler heads therefor
• CPC Class Codes: G01D 5/34 the beams of light being detected by photocells
• CPC Class Codes: G01N 29/225 Supports, positioning or alignment in moving situation

Abstract

An articulating probe for use with a coordinate measuring machine comprises an attachment portion, a measuring portion, and at least one articulating joint. The attachment portion can be configured for attachment to a coordinate measuring machine. The measuring portion can be configured to contact an object to be measured by the coordinate measuring machine. The at least one articulating joint can be configured to allow rotation between the attachment portion and the measuring portion. Further, the articulating joint can comprise an angular sensor configured to measure an angle of the joint.

Claims

1. An articulating probe for use with a coordinate measuring machine comprising:

an attachment portion configured for attachment to a coordinate measuring machine;

a measuring portion configured to contact an object to be measured by the coordinate measuring machine; and

at least one articulating joint configured to allow rotation between the attachment portion and the measuring portion, the articulating joint comprising an angular sensor configured to measure an angle of the joint.

2. The articulating probe of claim 1, wherein the angular sensor includes a light source, a hole, and a light sensor arranged such that an amount of light received by the light sensor indicates the angle of the joint.

3. The articulating probe of claim 1, wherein the measuring portion comprises an ultrasound pulser and receiver.

4. The articulating probe of claim 3, wherein the measuring portion comprises a flat end, the flat end being configured to contact the object to be measured.

5. The articulating probe of claim 4, wherein the ultrasound pulser and receiver are disposed on the flat end.

6. The articulating probe of claim 1, comprising at least two articulating joints configured to allow rotation between the attachment portion and the measuring portion, the articulating joints comprising angular sensors configured to measure angles of the joints.

7. The articulating probe of claim 1, wherein at least one articulating joint has a limited range of motion.

8. The articulating probe of claim 7, wherein the range of motion is no more than 15 degrees.

9. The articulating probe of claim 7, wherein the range of motion is approximately 7 degrees.

10. The articulating probe of claim 1, wherein the angular sensor of the at least one articulating joint comprises a light source and a light receiver.

11. The articulating probe of claim 10, wherein the angular sensor further comprises a hole between the light source and the light receiver, such that an amount of light passing from the light source to the light receiver through the hole varies with the angular position, and an angular position can be determined from the amount of light received by the light receiver.

12. The articulating probe of claim 11, wherein at one end of the angular range of motion allowed by the articulating joint, substantially all of the light from the light source is blocked by the hole from reaching the light receiver.

13. The articulating probe of claim 12, wherein at the end of the angular range of motion where substantially all of the light from the light source is blocked by the hole from reaching the light receiver, a small amount of light from the light source is allowed to pass through the hole and reach the light receiver.

14. The articulating probe of claim 1, wherein at one end of the angular range of motion allowed by the articulating joint, substantially all of the light from the light source is allowed to pass through the hole and reach the light receiver.

15. The articulating probe of claim 14, wherein at the end of the angular range of motion where substantially all of the light from the light source is allowed to pass through the hole and reach the light receiver, a small amount of light from the light source is blocked by the hole from reaching the light receiver.

16. The articulating probe of claim 1, wherein the measuring portion is configured to produce an analog measuring signal.

17. The articulating probe of claim 1, wherein the at least one angular sensor is configured to produce an analog angular signal.

18. The articulating probe of claim 1, further comprising a processing module configured to convert the analog signals to digital signals.

19. The articulating probe of claim 1, wherein the attachment portion provides an electronic connection for attachment to a coordinate measuring machine, and is further configured to transmit at least one of an analog or digital signal from the articulating probe to the coordinate measuring machine.

20. An articulated arm coordinate measuring machine comprising:

a base, one or more transfer members, and one or more articulation members connecting the one or more transfer members to the base, the articulated arm coordinate measuring machine being configured to measure a location of an end of the articulated arm; and

the articulating probe of any of the preceding claims attached to the end of the articulated arm.